Enoki
SOC-14 1K
What you need is a legion of about 1000 men but more important than giving them muskets or better weapons is giving them better tools. Handing a legion that is as much an engineering unit as a combat unit, good picks, shovels, axes, and other hand tools would buy you far more than just better weapons.
With good tools, and possibly some power tools to help brought from the future (think how much more they get done with a portable sawmill and a few chain saws than axes, adzes, spoke shaves, hand saws, etc.). This would allow them to rapidly build good shelter, fortifications, and other basic infrastructure.
Sure, they can fight when needed, but that wouldn't be their daily role. Think of them as combat engineers more than infantry.
As for disease and illness, just knowing how these propagate and how to minimize risk of them developing--for example knowing how to make a simple activated charcoal and sand filter for water to make it safer to drink would be a big advance--goes a long way here.
With good tools, and possibly some power tools to help brought from the future (think how much more they get done with a portable sawmill and a few chain saws than axes, adzes, spoke shaves, hand saws, etc.). This would allow them to rapidly build good shelter, fortifications, and other basic infrastructure.
Sure, they can fight when needed, but that wouldn't be their daily role. Think of them as combat engineers more than infantry.
As for disease and illness, just knowing how these propagate and how to minimize risk of them developing--for example knowing how to make a simple activated charcoal and sand filter for water to make it safer to drink would be a big advance--goes a long way here.